A kind of electric power interval switch cubicle is anti-to be strayed into monitoring deviceTechnical field
The present invention relates to switch cubicle monitoring technical field, and in particular to a kind of electric power interval switch cubicle is anti-to be strayed into monitoring dressPut.
Background technology
Interval is strayed into the security incident of power system causes personal injury event to happen occasionally, trace it to its cause mainly have withLower two aspect factors：(1) human factor:The safety responsibility heart is not strong at work, thought dispersion attention, and in operation or workGuard not in place in work, or in strict accordance with technical specification of security do not operated or worked；(2) apparatus factor:Equipment is indicated notClearly, equipment is without reliable locking, without security warning and reliable quarantine measures.
Prevent the generation of serious misoperation fault and mistakenly entering charged chamber, except do a good job of it maintenance, operations staff safetyOutside monitoring in ideological education, reinforcement safe practice professional training and reinforcement operation operation and service work, it should also be set from inspectionStandby Hardware countermeasures are set about.Such as check equipment prevents whether maloperation, preventing mistakenly entering charged chamber measure are perfect.
The content of the invention
Prevent being strayed into monitoring device it is an object of the invention to provide a kind of electric power interval switch cubicle, band is strayed into operating personnelBefore electricity interval, to speaking, light early warning, simultaneity factor can expand to remote short messages early warning.
To achieve the above object, present invention employs following technical scheme：
A kind of electric power interval switch cubicle is anti-to be strayed into monitoring device, including main control unit, infrared human body detection unit, without line numberAccording to transmission unit, electric-field intensity detection unit, enabling detection unit and maintenance Mark Detection unit, the wireless data transmission listMember is interconnected with main control unit, the infrared human body detection unit, electric-field intensity detection unit, enabling detection unit and maintenanceThe output end of Mark Detection unit is connected with the input of main control unit；
The main control unit is used to realize and to infrared human body detection, cabinet door state-detection and maintenance Mark DetectionControl, and realize the real-time communication with warning system；The infrared human body detection unit is used to detect is beaten in switch cabinet doorAfter opening, if personnel are movable around switch cabinet door；The electric-field intensity detection unit is used to realize to electric in switch cubicleField intensity is detected；The enabling detection unit is used for the opening for detecting and judging switch cabinet door；The maintenance markWill detection unit is used to whether be placed with maintenance mark on detection switch chamber door, opened according to maintenance mark controlling switch cabinet door orClose.
The infrared human body detection unit includes infrared human body detection sensor U3 and signal processing chip U4, the signalProcess chip U4 1 pin is connected through two in parallel resistance R4 and electric capacity C8 with its 2 pin, itself and 2 pin through resistance R8, electric capacity C10 andInfrared human body detection sensor U3 2 pin are connected, and infrared human body detection sensor U3 2 pin are through two resistance R9 and electric capacity in parallelC11 is grounded, and 8 pin of the signal processing chip U4 are grounded through resistance R11, C13 successively, between its 7 pin and resistance R11 and C13Node be connected, its output end is connected through resistance R6 with main control unit, and its 4 pin and 3 pin are respectively through resistance R10, R12 and master control listMember is connected.
The infrared human body detection sensor U3 uses model D203S chip, the type of the signal processing chip U4Number be EG4002.
The electric-field intensity detection unit uses model GM3120 sensor.
Also include the RS485 communication units being connected with main control unit.
The RS485 communication units use model MAX3485 communication chip.
The main control unit uses model STC12C5A60S2 main control chip.
The wireless data transmission unit uses model SI4432 communication chip.
As shown from the above technical solution, electric power interval of the present invention switch cubicle is anti-is strayed into monitoring device, in operatorBefore member's mistakenly entering charged chamber, to speaking, light early warning, simultaneity factor can expand to remote short messages early warning.Present invention monitoringMore comprehensively, multi-angle comprehensive to switch cubicle monitoring can be realized, very big limit reduction switch cubicle is strayed into rate, it is ensured that openClose the operation safety of the cabinet maintainer person and switch cubicle.In addition, present invention alarm is more timely, when monitoring system has been detectedPersonnel's illegal operation switch cubicle or when being strayed into switch cubicle, alarm terminal being capable of alert, and upwards at the scene in timeLevel administrative staff send warning message.
Brief description of the drawings
Fig. 1 is the circuit block diagram of the present invention；
Fig. 2 is the chip figure of the main control unit of the present invention；
Fig. 3 is the circuit diagram of the infrared human body detection unit of the present invention.
Embodiment
The present invention will be further described below in conjunction with the accompanying drawings：
As shown in figure 1, the electric power interval switch cubicle of the present embodiment is anti-to be strayed into monitoring device, including main control unit 1, infrared peopleBody detection unit 2, wireless data transmission unit 3, electric-field intensity detection unit 4, enabling detection unit 5 and maintenance Mark Detection listMember 6, wireless data transmission unit 3 is interconnected with main control unit 1, infrared human body detection unit 2, electric-field intensity detection unit 4,Enabling detection unit 5 and the output end of maintenance Mark Detection unit 6 are connected with the input of main control unit 1.
As shown in Fig. 2 the main control unit of the present embodiment has the chip and Peripheral clock using model STC12C5A60S2Circuit is constituted, and is mainly used in realizing and to infrared human body detection, cabinet door state-detection and the control for overhauling Mark Detection, andRealize the real-time communication with warning system.Electric capacity C9 and resistance R7 in circuit is main control unit reset circuit, and electric capacity C6, C7 areMain control unit power input filter capacitor, crystal oscillator Y1, electric capacity C23, C24 composition main control unit clock circuit.
As shown in figure 3, infrared human body detection unit 2 is used to detect after switch cabinet door is opened, if Ren YuanIt is movable around switch cabinet door.The infrared human body detection sensor U3 of the infrared human body detection unit 2 including model D203S andModel EG4002 signal processing chip U4, signal processing chip U4 1 pin through two in parallel resistance R4 and electric capacity C8 with its 2Pin be connected, itself and 2 pin are connected through resistance R8, electric capacity C10 with infrared human body detection sensor U3 2 pin, infrared human body detect biographySensor U3 2 pin are grounded through two resistance R9 and electric capacity C11 in parallel, and signal processing chip U4 8 pin are successively through resistance R11, C13Ground connection, the node between its 7 pin and resistance R11 and C13 is connected, and its output end is connected through resistance R6 with main control unit 1, its 4 pinIt is connected respectively through resistance R10, R12 with main control unit 1 with 3 pin.
Signal processing chip U4 working frequency is set by R11 and C13, approximate working frequency and resistance electricityRelation is by formula between appearance：
In formula (1), the unit of resistance is K, and the unit of electric capacity is nF, TOSCUnit is uS；Frequency f=1/TOSCIt is determined that, such asWhen R11=100K, C13=1nF, the corresponding work period is T=0.4*100*1*1.25=50uS, and oscillator frequency is f=1/T=20KHz.When selecting pull-up resistor R11, more than 100K resistance need to be more than.
Signal processing chip U4 output end is connected by current-limiting resistance R6 with the pin P1.5 of main control unit 1, is realizedMonitoring to personnel activity's signal, signal processing chip U4 A pins pass through pull-up resistor R10 and the P1.6 pins of main control unitIt is connected, realizes the control to signal processing chip U4 triggering modes, signal processing chip U4 VC pins passes through pull-up resistor R12It is connected with main control unit P1.7 pins, realizes and signal processing chip U4 enable is controlled.
Electric-field intensity detection unit 4 is used to realize to be detected to switch cubicle electric field intensity inside high, the electric-field strength of the present embodimentSpend sensor of the detection unit 4 using model GM3120.Enabling detection unit 5 is used to detect and judge opening for switch cabinet doorOpen state；Maintenance Mark Detection unit 6 is used to whether be placed with maintenance mark on detection switch chamber door, according to maintenance mark controlCabinet door is turned on and off, and is placed only on chamber door in the case of maintenance mark, switch cubicle just allows to be overhauled, and otherwise, forbidsOperation switch cabinet.
The present embodiment also includes the RS485 communication units 7 being connected with main control unit 1, and the communication unit 7 is used for extending adoptingCollect communication modes.RS485 communication units 7 use model MAX3485 communication chip.Wireless data transmission unit 3 uses typeNumber be SI4432 communication chip.
Operation principle：Status indicator lamp is pointed out according to contact live monitoring sensor feedback result under normal operating conditionsThe powered situation in contact and inspecting state in current switch cabinet, after maintainer places maintenance mark on switch cubicle, stateIndicator lamp has red to be changed into green, represents that current switch cabinet allows maintenance.Staff is when operation allows the switch cubicle of maintenanceMust be judged open the light according to powered indicator lamp in cabinet whether powered (red light：Contact is a little in switch cubicle；Green light：Contact in switch cubicleIt is not charged), when powered in switch cubicle, maintainer forbids opening rear door of switch cabinet, and otherwise onsite alarming terminal can send sceneSound and light alarm and remote short messages alarm；When maintainer overhauls front door, then need to close front door at the appointed time, otherwise alarmTerminal can equally point out warning message.When allowing not charged in the switch cubicle of maintenance, maintainer can be opened before the cabinet that opens the light/Back door, is overhauled to equipment in switch cubicle.Staff is in the switch cubicle that attendant exclusion is overhauled, and system can start acoustic sceneLight alarm terminal and remote short messages alarm, inform the switch cubicle of upper management personnel someone attendant exclusion maintenance.
The present invention only need to install tesla's sensor when installing in switch cubicle inwall, you can realize strong to switch cubicle internal electric fieldDegree monitoring, installs transformer, so that it is guaranteed that the phase that monitoring system is arranged with switch cubicle interior lines without being flow back in switch cubicle interior lines in roadMutually separation, will not bring potential safety hazard to switch cabinet system.
Embodiment described above is only that the preferred embodiment of the present invention is described, not to the model of the present inventionEnclose and be defined, on the premise of design spirit of the present invention is not departed from, technical side of the those of ordinary skill in the art to the present inventionIn various modifications and improvement that case is made, the protection domain that claims of the present invention determination all should be fallen into.